It was the best of times, it was the worst of times. Day 10 (for me) of the DeepLens Challenge (I first blogged about this here). I have made some progress and am now able to match face images, retrieved from the DeepLens Camera, against a face image gallery I built using AWS S3, Lambda, DynamoDB and the Rekognition Service (I used this blog post to get things setup). Using the Rekognition Service was actually pretty straight forward and easy, especially as there is a clear blog outlining how to start using it to go from. Unfortunately, working with the DeepLens Camera is not so easy at times.
Downloading Projects from the AWS Console to the DeepLens sometimes get hung up. I found that running
sudo systemctl restart greengrassd.service
on the Camera usually kicks it into gear and allows the Project to download. But the build deploy process is time consuming and fraught with missteps.
Your Project version can only go up to 9 for some reason, so I was deleting my Project when the Version hit 9. However, I ran into a bug last night where the DeepLens Camera would get Deregistered whenever you deleted an associated Project. So that meant resetting the device to put the on-board Wifi in the right state so that the device could be Registered with Amazon again. Arrrggh! And no deleting Projects until this is over!
My DeepLens was automatically updating itself putting my Camera in a bad state as the AWS Camera software was apparently incompatible with the Linux updates I was receiving. I finally figured out how to turn off the automatic updates (done when Registering the DeepLens with AWS), and followed steps to lock-in Linux kernel 4.10.17+.
This is a cool little song from the immensely talented Martin Garrix. I first heard this song at AWS re:Invent in 2016. The depth of the bass and sharpness of the sounds blew me away, not to mention the psychedelic jelly-fish visuals.
This is Day 5 (for me) of the DeepLens Challenge, which I talked about starting in my post here. I have to submit my project by February 12th or 13th. I’m making progress toward my project goal, which right now is simply to recognize a face in an image cache from a live video feed using the stock face detection model on the DeepLens device. Face and image recognition is pretty common place today, I guess, but I’m stoked to get something similar working myself. I’d also love to integrate Alexa into the mix somehow as well, but I need to start making bigger strides with less messing about with the fiddly things!
Coding Challenges And Solutions
Some of the challenges I’ve faced, and (mostly) overcome, so far include:
Cropping a detected face out of the DeepLens video feed in the Lambda Python script. Turns out this is very simple, but it took me a while to figure out.
How to convert the cropped face image to a jpg and write it to disk. Also very simple in retrospect, but I’m a moron.
I thought it would be easy to write the resulting face jpg to AWS S3 from the DeepLens edge device, but this one I just could not figure out due to permission issues. I can write to S3 using the aws cli as the aws_cam user, but so far I’ve not been able to extend those same permissions to the ggc_user account, which seems is what runs the awscam software. I even hard-coded credentials in the creation of my S3 client in the lambda code, but still had permission problems. I had to back-off from hacking on the device out of fear of really screwing something up, however. Best to stay off the DeepLens as much as possible in retrospect.
The only way I was able to get a face image off the DeepLens and into the cloud so far is by converting it to a base64 String, putting into a JSON object, and putting it on the IoT Topic. I worry that all this data transfer is going to cost me an arm-and-a-leg by the end of this thing…
When creating a lambda function to read from the IoT Topic, I kept getting a random error when trying to save it, which made no sense as I was following an AWS Blog Post for how to do the same. Then I found this: https://forums.aws.amazon.com/thread.jspa?messageID=825417&tstart=0. And this is what makes hackathons using new technology so fun! Writing software is really just lots of Google Searches.
And speaking of the Internet of Things (IoT), to-date I’ve thought this was just another marketing buzz word that wasn’t going to pan-out, so to speak. I used to think the same about ‘cloud’ (and still think this about Bitcoin and its ilk). But this DeepLens development challenge is giving me a greater appreciation for IoT and edge computing. In fact, we’ve been talking about the proliferation of internet connected things and the resulting possibilities since Java Jini, and probably before that, but I suspect Python will be its great enabler instead of Java at this point. But I digress…
Baby Steps, But Machine Learning Learning No Where In Sight
So as of today, I am able to leverage the stock face detection model to detect and crop a face out of a live video feed from DeepLens, send it up to the AWS Cloud Lambda IOT Topic Listener, and put it into an S3 Bucket. Next step is to try to figure out how to use the AWS Rekognition service to recognize face images in an image cache.
The Flow Zone
I’ve found listening to music particularly distracting these last few days. However, I find this Horn Solo in Tchaikovsky’s 5th Symphony really soothing and not distracting (but too short). I played this solo in Solo and Ensemble in High School. I’ve been told that french horn players are better kissers…
So far, I’ve learned some painful, hard-fought, lessons in the last two days. I was initially able to register my DeepLens device with AWS Cloud, no problem. The first hiccup I encountered was when I tried to push one of the pre-made models down to the device. They simply would not go, and there are no logs to look at, as that might be too helpful. So, thinking like a DeepLens device myself, I reasoned I probably screwed-up the IAM roles when I tried to register the device (later I learned my assumption was spot-on). To correct the model push problem I was having, I Deregistered the device hoping I could simply go through the Registration process again making sure my IAM Roles were properly configured. And wouldn’t you know the dang wifi on the device stopped working preventing me from logging in to the device to re-register it with the cloud.
The way the DeepLens currently works is that you can only configure it (and upload the certificates it needs to identify itself with your AWS Account) by using it’s on-board wifi and pointing your web browser (on another computer) to http://192.168.0.1. I still can’t get over how odd this is – not sure what Amazon was thinking with this 🙂 . I think it’s odd because my first inclination is to treat the DeepLens like a first-class computer, meaning I have my keyboard, mouse and monitor connected to it. Why would I need to configure it from another computer over wifi? OMG so funny!!
Whither Went My DeepLens Wifi
So the wifi simply would not come on again, as life’s ironies often dictate. So my girlfriend and I went out to Best Buy in 20 degree weather (I bet your girlfriend wouldn’t do that) to buy a USB Hub and a USB-to-Ethernet connector, the idea being that if I could get the device online over ethernet, maybe I could configure this thing that way. Using a hard-wired ethernet connection, my DeepLens was back online, but now with an IP Address of 192.168.1.13. The instructions say to connect to your device console using http://192.168.0.1. Being the contrarian that I am, I tried to connect using http://192.168.1.13 – yeah, no dice. In fact, I could not even find anything running on port 80 of the device at this point. What had I done?!?
AWS guys, I’d totally put an ethernet port in the back of this device.
After poking around a bit, I found the awscam software in /opt/awscam. It looks to me like the DeepLens console is just a nodejs app that is served by some python scripts in the daemon-scripts directory. And wouldn’t you know, those scripts are hard-coded to bind the nodejs app to the wifi device and to run on port 192.168.0.1. I’m dying here. Ok, so I either have to figure out how to modify the daemon python scripts to use the eth0 device and bind to 192.168.1.13, or I have to get the on-board wifi working again.
Luckily, I saw a mention on the AWS forum about a possible Linux Kernel incompatibility with the DeepLens wifi hardware, so I decided to try the path of getting the wifi hardware working again by reverting to an older Linux Kernel, if one even existed – I didn’t know at this point. The following video got me over the hardest piece of solving how to boot an older Ubuntu Kernel:
The GRUB Loader does not display upon reboot in the DeepLense by default, so my first step was to get the GRUB Menu to show:
comment out GRUB_HIDDEN_TIMEOUT
sudo update-grub (or do it as root)
Once the device reboots you will finally see the GRUB menu – fantastic! Select advanced settings, then select the 4.10.17+ kernel. Once rebooted, the on-board wifi should be working again and the little blinky middle light should be happy again. Now you should be back on track to register your device per the AWS instructions. And if you ever need the happy blinking middle wifi light again, the setup pin hole in the back of the camera should work as long as you are running the correct Linux Kernel.
I’m not positive the kernel is the problem, but I am positive these steps worked for me. And how did I get kernel 4.13.0-26-generic installed in the first place? I’m not even sure. I did try to update my device, and maybe that was the start of the problem? I’m not sure.
Anyway, I am now able to download the pre-built Face-Detection Project to my device, as seen here:
At this rate, it’s doubtful I’ll get anything built by the hackathon deadline, but it’s kind of fun messing with the hardware.
This Armin Van Buuren Ibiza set is so tight. Love it, especially around minute 40!
I know next to nothing about Machine Learning. Shoot, I don’t even have a C.S. Degree. But damn the torpedoes, full speed ahead, I’ve committed to completing a project for the AWS DeepLens Hackathon, currently slated to conclude on this February 14th, 2018. Technology is advancing at a break-neck pace and this is one way to try to keep up. Plus, I’ve heard that the first Trillionaires will be minted from the A.I. Industry, so show me the money! I thought it would be cool to blog some of my experience using the DeepLens technology during this hackathon (and I’m actually writing this blog on my DeepLens device).
Actually, on a side note, I’m a little worried about where technology is going these days, especially with such a strong emphasis on A.I. and autonomous machines and all, all driven by profit and power motives, not REAL problems. If we’re not innovating, we’re dying, right? But as Sun Tzu once said, keep your friends close but your (potential) enemies closer.
Confronting the Beast
I went to AWS re:Invent last November in Vegas and somehow managed to get into one of the last DeepLens Workshops of the Conference. Competition for these workshops was, shall we say, fierce! Attending meant I had to miss the re:Play party, but at that point I didn’t really care since the D.J. was not Van Buuren, Garrix or AfroJack. By attending the DeepLens Workshop, I was able to take a free DeepLens computer home, and even received a voucher for $25 worth of AWS Credits to get started.
I was really psyched to get started on the hackathon upon returning home, but I already had a project in progress I had to complete first. Fortunately, I finally completed my Android App (my second Android App ever) and got it released in the Google Play Store (CANDLES Tracker) on 1/11, so I finally have my evenings ‘free’ to devote to this hackathon.
So yesterday, 1/12, I cracked open my DeepLens box and unpacked the device. I realized I needed a new keyboard, mouse and HDMI cable with a micro-HDMI male end. So last night I ordered these things, off of Amazon…of course, and received them in a Prime Shipment by the time I got home from work this evening.
Tonight, 1/13, my DeepLens is all connected and registered with my AWS Account. I imagine it’s not going to take me long to burn through the $25 AWS Credits when I start uploading data to train my models, which I will hopefully get a better feel for this weekend.
Once the camera boots-up, you can log into the OS using the password ‘aws_cam’, which is the same as the username. You can connect to wifi and use Firefox to get on the internet and access your AWS Account from there. Strangely though, the instructions say to connect to the DeepLens Wifi endpoint from another computer and configure it using a browser pointing to http://192.168.0.1. I found this strange as I was already logged into the device, but could not get Firefox to connect to http://localhost to connect to the configuration portal from within the device. But it’s all working now by simply not thinking and following the instructions.
Start deploying some of the Amazon pre-built models to get a better feel for the deploy process and integration possibilities outside of the device.
I’ve recently gotten hooked on this Carl Cox Ibiza set, which is a nice groove for hacking to, I’ve found: